Add 8/7 and 27/40
1st number: 1 1/7, 2nd number: 27/40
8/7 + 27/40 is 509/280.
Steps for adding fractions
- Find the least common denominator or LCM of the two denominators:
LCM of 7 and 40 is 280
Next, find the equivalent fraction of both fractional numbers with denominator 280 - For the 1st fraction, since 7 × 40 = 280,
8/7 = 8 × 40/7 × 40 = 320/280 - Likewise, for the 2nd fraction, since 40 × 7 = 280,
27/40 = 27 × 7/40 × 7 = 189/280 - Add the two like fractions:
320/280 + 189/280 = 320 + 189/280 = 509/280 - So, 8/7 + 27/40 = 509/280
In mixed form: 1229/280
MathStep (Works offline)
Download our mobile app and learn to work with fractions in your own time:
Android and iPhone/ iPad
Related: 16/7+27/40 8/7+54/40 8/14+27/40 8/7+27/80 24/7+27/40 8/7+81/40 8/21+27/40 40/7+27/40 8/35+27/40 56/7+27/40 8/49+27/40